2120021020001 has 2 divisors, whose sum is σ = 2120021020002. Its totient is φ = 2120021020000.

The previous prime is 2120021019997. The next prime is 2120021020063. The reversal of 2120021020001 is 1000201200212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2060301390625 + 59719629376 = 1435375^2 + 244376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120021020001 - 2² = 2120021019997 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120021220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060010510000 + 1060010510001.

It is an arithmetic number, because the mean of its divisors is an integer number (1060010510001).

Almost surely, 2^{2120021020001} is an apocalyptic number.

It is an amenable number.

2120021020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120021020001 is an equidigital number, since it uses as much as digits as its factorization.

2120021020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2120021020001 its reverse (1000201200212), we get a palindrome (3120222220213).

The spelling of 2120021020001 in words is "two trillion, one hundred twenty billion, twenty-one million, twenty thousand, one".